Truck Cap

[RepublicOfTXPatriot]

FWIW, I looked into those ARE aluminum caps, and found several posts over on the Expedition Portal site by people who had them, and discovered that spending a lot of time on rough Forest Service roads and similar led to the welds on the aluminum frame failing.  Not right away, but eventually.  Obviously, I can't vouch for whether or not it's true.  YMMV.

I wonder if a strip of heavy rubber between cap and bed would seal, and also takes some of the shock out of it. Or would this mess up during rough trails and cause it to move. I'm thinking nutted bolts with wingnuts. Last time I had a cap I used "C" clamps.